mediatek: add SD card image creation for Banana Pi R2

Based on work by Alexey Loukianov <lx2@lexa2.ru> and others.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
master
David Woodhouse 4 years ago committed by Petr Štetiar
parent 0c7bce7efd
commit 7adc29f59e

@ -2,7 +2,7 @@ diff --git a/configs/mt7623n_bpir2_defconfig b/configs/mt7623n_bpir2_defconfig
index 6b9fbd7e22..fb2a004803 100644
--- a/configs/mt7623n_bpir2_defconfig
+++ b/configs/mt7623n_bpir2_defconfig
@@ -52,3 +52,12 @@ CONFIG_TIMER=y
@@ -52,3 +52,13 @@ CONFIG_TIMER=y
CONFIG_WDT_MTK=y
CONFIG_LZMA=y
# CONFIG_EFI_LOADER is not set
@ -15,3 +15,4 @@ index 6b9fbd7e22..fb2a004803 100644
+CONFIG_ENV_FAT_FILE="uboot.env"
+CONFIG_CMD_ASKENV=y
+CONFIG_ENV_SIZE=0x2000
+CONFIG_CMD_SETEXPR=y

@ -0,0 +1,4 @@
config BANANA_PI_BOOT_PARTSIZE
int "Boot (SD Card) filesystem partition size (in MiB)"
depends on TARGET_mediatek_mt7623_DEVICE_bpi_bananapi-r2
default 32

@ -0,0 +1,145 @@
#!/bin/sh
#
# Copyright © 2019 Alexey Loukianov <lx2@lexa2.ru>
# Copyright © 2020 David Woodhouse <dwmw2@infradead.org>
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
# Generates a bootable SD card image for Banana Pi R2 (and probably
# other similar boards) as documented at
# http://www.fw-web.de/dokuwiki/doku.php?id=en:bpi-r2:storage
#
# The first sector must contain the SDMMC_BOOT header shown
# below, and also contains the MBR partition table in the end
# of the sector. The partition table must contain no active
# partitions.
#
# The second sector must contain the BRLYT header, and the
# special preloader image goes in sector 4; 2KiB into the image.
#
# The preloader loads U-Boot from sector 640; 320KiB into the image.
# The location and the size (512KiB) are fixed and not read from
# the partition table. We set up a partition for it merely for
# our own convenience for upgrades, etc.
#
# The second partition is a FAT file system containing the kernel
# image and a uboot.env file, which is provided to this script as
# $4 (bootfs image). Its size is configurable with the
# CONFIG_BANANA_PI_BOOT_PARTSIZE option; by default 32MiB.
#
# The root filesystem comes next in the third partition.
#
#
# ------------------------ Sector Offset
# | MBR + SDMMC_BOOT | 0 0x0
# |----------------------|
# | BRLYT header | 1 0x200
# |----------------------|
# . .
# . .
# |----------------------|
# | | 4 0x800
# | |
# | Preloader |
# . .
# . .
# | | 639
# |----------------------|
# | MBR partition #1 | 640 0x50000
# | |
# | U-Boot |
# . .
# . .
# | | 1663
# |----------------------|
# | MBR partition #2 |
# | |
# | FAT partition | ( BANANA_PI_BOOT_PARTSIZE
# . . default 32MiB )
# . (kernel, uEnv) .
# | |
# |----------------------|
# | MBR partition #3 |
# | |
# | Root partition |
# | | ( TARGET_ROOTFS_PARTSIZE
# | (squashfs+overlay | default 104MiB )
# . or ext4, etc.) .
# . .
# | |
# ------------------------
#
# For eMMC boot, everything up to and including the preloader must be
# written to /dev/mmcblk0boot0, with the SDMMC_BOOT header changed to
# read EMMC_BOOT\0 instead.
#
# The contents of the main eMMC are identical to the SD card layout,
# with the preloader loading 512KiB of U-Boot starting at 0x50000.
function usage() {
echo "SYNTAX: $0 sd <file> <preloader image> <u-boot image> <bootfs image> <rootfs image> <bootfs size> <rootfs size>"
echo " OR: $0 emmc <file> <preloader image>"
exit 1
}
set -e
PRELOADER_OFFSET=2 # 2KiB
SDMMC_BOOT="SDMMC_BOOT\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00"
EMMC_BOOT="EMMC_BOOT\x00\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00"
BRLYT="BRLYT\x00\x00\x00\x01\x00\x00\x00\x00\x08\x00\x00\
\x00\x08\x00\x00\x42\x42\x42\x42\x08\x00\x01\x00\x00\x08\x00\x00\
\x00\x08\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
case $1 in
sd)
[ $# -eq 8 ] || usage
OUTPUT="$2"
PRELOADER="$3"
UBOOT="$4"
BOOTFS="$5"
ROOTFS="$6"
BOOTFSSIZE="$7"
ROOTFSSIZE="$8"
head=4
sect=63
set $(ptgen -o $OUTPUT -h $head -s $sect -a 0 -l 1024 \
-t 41 -p 512k@320k \
-t c -p ${BOOTFSSIZE}M \
-t 83 -p ${ROOTFSSIZE}M )
UBOOT_OFFSET="$(($1 / 512))"
UBOOT_SIZE="$(($2 / 512))"
BOOTFS_OFFSET="$(($3 / 512))"
BOOTFS_SIZE="$(($4 / 512))"
ROOTFS_OFFSET="$(($5 / 512))"
ROOTFS_SIZE="$(($6 / 512))"
echo -en "${SDMMC_BOOT}" | dd bs=1 of="${OUTPUT}" seek=0 conv=notrunc
echo -en "${BRLYT}" | dd bs=1 of="${OUTPUT}" seek=512 conv=notrunc
dd bs=1024 if="${PRELOADER}" of="${OUTPUT}" seek="${PRELOADER_OFFSET}" conv=notrunc
dd bs=512 if="${UBOOT}" of="${OUTPUT}" seek="${UBOOT_OFFSET}" conv=notrunc
dd bs=512 if="${BOOTFS}" of="${OUTPUT}" seek="${BOOTFS_OFFSET}" conv=notrunc
dd bs=512 if="${ROOTFS}" of="${OUTPUT}" seek="${ROOTFS_OFFSET}" conv=notrunc
dd bs=128k if=/dev/zero of="${OUTPUT}" count=1 oflag=append conv=notrunc
;;
emmc)
[ $# -eq 3 ] || usage
OUTPUT="$2"
PRELOADER="$3"
echo -en "${EMMC_BOOT}" | dd bs=1 of="${OUTPUT}" seek=0
echo -en "${BRLYT}" | dd bs=1 of="${OUTPUT}" seek=512 conv=notrunc
dd bs=1024 if="${PRELOADER}" of="${OUTPUT}" seek="${PRELOADER_OFFSET}" conv=notrunc
;;
*)
usage
;;
esac

@ -1,5 +1,30 @@
KERNEL_LOADADDR := 0x80008000
ifneq ($(CONFIG_BANANA_PI_BOOT_PARTSIZE),)
BOOTFS_BLOCK_SIZE := 1024
BOOTFS_BLOCKS := $(shell echo $$(($(CONFIG_BANANA_PI_BOOT_PARTSIZE)*1024*1024/$(BOOTFS_BLOCK_SIZE))))
endif
define Build/banana-pi-sdcard
rm -f $@.boot
mkfs.fat -C $@.boot $(BOOTFS_BLOCKS)
./gen_banana_pi_img.sh emmc $@.emmc \
$(STAGING_DIR_IMAGE)/$(UBOOT_TARGET)-preloader.bin
mkenvimage -s 0x2000 -o $(STAGING_DIR_IMAGE)/$(UBOOT_TARGET)-uboot.env $(UBOOT_TARGET)-uEnv.txt
mcopy -i $@.boot $(STAGING_DIR_IMAGE)/$(UBOOT_TARGET)-uboot.env ::uboot.env
mcopy -i $@.boot $(IMAGE_KERNEL) ::uImage
mcopy -i $@.boot $@.emmc ::eMMCboot.bin
./gen_banana_pi_img.sh sd $@ \
$(STAGING_DIR_IMAGE)/$(UBOOT_TARGET)-preloader.bin \
$(STAGING_DIR_IMAGE)/$(UBOOT_TARGET)-u-boot.bin \
$@.boot \
$(IMAGE_ROOTFS) \
$(CONFIG_BANANA_PI_BOOT_PARTSIZE) \
$(CONFIG_TARGET_ROOTFS_PARTSIZE)
endef
define Device/bpi_bananapi-r2
DEVICE_VENDOR := Bpi
DEVICE_MODEL := Banana Pi R2
@ -7,6 +32,11 @@ define Device/bpi_bananapi-r2
SUPPORTED_DEVICES := bananapi,bpi-r2
DEVICE_PACKAGES := kmod-fs-vfat kmod-nls-cp437 kmod-nls-iso8859-1 kmod-mmc \
mkf2fs e2fsprogs kmod-usb-ohci kmod-usb2 kmod-usb3 kmod-ata-ahci-mtk
UBOOT_TARGET := mt7623n_bpir2
IMAGES := img.gz
IMAGE/img.gz := banana-pi-sdcard | gzip | append-metadata
KERNEL := kernel-bin | fit none $$(DTS_DIR)/$$(DEVICE_DTS).dtb
KERNEL_INITRAMFS :=
endef
TARGET_DEVICES += bpi_bananapi-r2

@ -0,0 +1,78 @@
# Boot menu for Banana Pi R2
# Copyright © 2020 David Woodhouse <dwmw2@infradead.org>
kernel=uImage
loadaddr=0x88000000
dtaddr=0x83f00000
fdt_high=0xffffffff
console=ttyS2,115200
bootopts=rootfstype=squashfs,ext4 rootwait
# Create the command line (with appropriate root=) and boot the Linux FIT image.
boot1=setenv bootargs "console=${console} root=${rootdev} ${bootopts}";printenv bootargs;\
fatload mmc ${partition} ${loadaddr} ${kernel}; bootm
# The preloader leaves a breadcrumb behind to say what it booted from.
checkbootedfrom=if itest.l *81dffff0 == 434d4d65 ; then setenv bootedfrom eMMC; else setenv bootedfrom SD; fi;
# Build the boot menu one item at a time
bm_count=0
checkkernel=test -e mmc ${bm_part} ${kernel}
addbm=if run checkkernel; then setenv bootmenu_${bm_count} "Boot from ${bm_dev}.=setenv partition ${bm_part};setenv rootdev ${bm_root};run boot1";if test "${bootedfrom}" = "${bm_dev}"; then setenv bootmenu_default ${bm_count};fi;setexpr bm_count ${bm_count} + 1; fi
# Here we assume that SD card id mmcblk1 and eMMC is mmcblk0 in linux. Swap them if your DTS define them in reverse order.
addeMMCbm=setenv bm_part 0:2;setenv bm_root /dev/mmcblk0p3;setenv bm_dev eMMC;run addbm
addSDbm=setenv bm_part 1:2;setenv bm_root /dev/mmcblk1p3;setenv bm_dev SD;run addbm
addinstallbm=if test "${bootedfrom}" = "SD";then run checkinstall; if run validparts; then setenv bootmenu_${bm_count} "Install OpenWrt from SD to internal eMMC.=run doinstall";setexpr bm_count ${bm_count} + 1;fi;fi
runbootmenu=if test "${bootedfrom}" = "";then run checkbootedfrom;fi;\
setenv bm_count 0;run addeMMCbm;run addSDbm;run addinstallbm;setenv bootmenu_${bm_count};\
bootmenu
bootdelay=0
bootcmd=run checkbootedfrom;run runbootmenu
# XX: Can we read this from the device, or must we trust they're all the same as mine?
# Probably not that important as we're unlikely ever to hit the limit anyway.
maxsect=0xe8ffff
validparts=false
# We could use 'part size' here but I'd like to check the types too.
checkinstall=mmc dev 1;\
mmc read 0x88000002 0 1;\
setenv validparts true;\
test -e mmc 1:2 eMMCboot.bin || setenv validparts false && echo "eMMCboot.bin not present on SD partition 2";\
if run validparts && itest.b *0x880001c4 != 0x41; then echo "SD partition 1 is not a PReP Boot partition"; setenv validparts false; fi;\
if run validparts && itest.l *0x880001c8 != 0x280; then echo "SD partition 1 does not start at 320KiB for U-Boot"; mmc part; exit; fi;\
if run validparts && itest.l *0x880001cc != 0x400; then echo "SD partition 1 is not 512KiB in size for U-Boot"; mmc part; exit; fi;\
if run validparts && itest.b *0x880001d4 != 0x0c; then echo "SD partition 2 is not a FAT32 partition"; setenv validparts false; fi;\
if run validparts && itest.b *0x880001e4 != 0x83; then echo "SD partition 3 is not a Linux partition"; setenv validparts false; fi;\
setexpr.l part2_start *0x880001d8;setexpr.l part2_len *0x880001dc;setexpr.l part3_start *0x880001e8;setexpr.l part3_len *0x880001ec;\
if run validparts && test 0x${part2_start} -gt ${maxsect}; then echo "SD partition 2 start too high"; setenv validparts false; fi;\
if run validparts && test 0x${part2_len} -gt ${maxsect}; then echo "SD partition 2 is too large"; setenv validparts false; fi;\
if run validparts && test 0x${part3_start} -gt ${maxsect}; then echo "SD partition 3 start too high"; setenv validparts false; fi;\
if run validparts && test 0x${part3_len} -gt ${maxsect}; then echo "SD partition 2 is too large"; setenv validparts false; fi;\
setexpr.l part2_end 0x$(part2_start} + 0x${part2_len};setexpr.l part3_end 0x${part3_start} + 0x${part3_len};\
if run validparts && test 0x${part2_end} -ge ${maxsect}; then echo "SD partition 2 end too high"; setenv validparts false; fi;\
if run validparts && test 0x${part3_end} -ge ${maxsect}; then echo "SD partition 3 end too high"; setenv validparts false; fi;
# Copy a single chunk, up to 0x8000 sectors / 16MiB, from SD to eMMC at the specified offset.
writechunk=setenv thislen 8000; if test 0x${partlen} -lt 0x${thislen}; then setenv thislen ${partlen};fi;\
mmc dev 1;mmc read ${loadaddr} 0x${partofs} 0x${thislen};\
mmc dev 0; mmc write ${loadaddr} 0x${partofs} 0x${thislen};\
setexpr partofs 0x${partofs} + 0x${thislen};setexpr partlen 0x${partlen} - 0x${thislen}
# Copy a partition defined by ${partofs} / ${partlen} from SD to eMMC
writepart=while test 0x${partlen} -ne 0; do run writechunk; done
# Configure the eMMC boot partition and write eMMCboot.bin to it
writeboot=mmc partconf 0 1 1 0;fatload mmc 1:2 ${loadaddr} eMMCboot.bin;\
setexpr filesize ${filesize} + 0x1ff;setexpr blocks ${filesize} / 0x200;\
mmc dev 0 1;mmc write ${loadaddr} 0 ${blocks}
# Install OpenWrt from the SD card to internal eMMC.
doinstall=run checkinstall;if run validparts;then run writeboot;\
echo "Copying preloader and U-Boot";setenv partofs 0;setenv partlen 680;run writepart;\
echo "Copying FAT boot partition";setenv partofs ${part2_start};setenv partlen ${part2_len};run writepart;\
echo "Copying root partition";setenv partofs ${part3_start};setenv partlen ${part3_len};run writepart;\
echo "Installed OpenWrt to eMMC";setenv bootedfrom eMMC;run runbootmenu;fi
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